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Type: Journal article
Title: Drosophila orthologue of WWOX, the chromosomal fragile site FRA16D tumour suppressor gene, functions in aerobic metabolism and regulates reactive oxygen species
Author: O'Keefe, L.
Colella, A.
De Barros Lopes, S.
Chen, Q.
Choo, A.
Jacob, R.
Price, G.
Venter, D.
Richards, R.
Citation: Human Molecular Genetics, 2011; 20(3):497-509
Publisher: Oxford Univ Press
Issue Date: 2011
ISSN: 0964-6906
Statement of
Louise V. O'Keefe, Alex Colella, Sonia Dayan, Qingwen Chen, Amanda Choo, Reuben Jacob, Gareth Price, Deon Venter and Robert I. Richards
Abstract: Common chromosomal fragile sites FRA3B and FRA16D are frequent sites of DNA instability in cancer, but their contribution to cancer cell biology is not yet understood. Genes that span these sites (FHIT and WWOX, respectively) are often perturbed (either increased or decreased) in cancer cells and both are able to suppress tumour growth. While WWOX has some tumour suppressor characteristics, its normal role and functional contribution to cancer has not been fully determined. We find that a significant proportion of Drosophila Wwox interactors identified by proteomics and microarray analyses have roles in aerobic metabolism. Functional relationships between Wwox and either CG6439/isocitrate dehydrogenase (Idh) or Cu–Zn superoxide dismutase (Sod) were confirmed by genetic interactions. In addition, altered levels of Wwox resulted in altered levels of endogenous reactive oxygen species. Wwox (like FHIT) contributes to pathways involving aerobic metabolism and oxidative stress, providing an explanation for the ‘non-classical tumour suppressor’ behaviour of WWOX. Fragile sites, and the genes that span them, are therefore part of a protective response mechanism to oxidative stress and likely contributors to the differences seen in aerobic glycolysis (Warburg effect) in cancer cells.
Keywords: Cell Line, Tumor; Animals; Humans; Drosophila; Reactive Oxygen Species; Oxidoreductases; Isocitrate Dehydrogenase; Superoxide Dismutase; Drosophila Proteins; Tumor Suppressor Proteins; Microarray Analysis; Polymerase Chain Reaction; Proteomics; Cell Respiration; Gene Expression; Aerobiosis; Base Sequence; Glycolysis; Oxidative Stress; Genes, Tumor Suppressor; Chromosome Fragile Sites; Mass Spectrometry; Metabolic Networks and Pathways
Rights: Copyright Authors. Copyright © 2011 Oxford University Press
RMID: 0020101320
DOI: 10.1093/hmg/ddq495
Appears in Collections:Molecular and Biomedical Science publications

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